General Information:
Chemical Formula:
(La,Ce)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17
IMA Status:
Approved IMA 1987
Locality:
Near the Chinglusuai River, Lovozero Massif, Kola Pininuula, Russia.
Name Origin:
Named after the word for north because of its northern origin in the Lovozero Massif.
Physical Properties:
Cleavage:
[???] Good
Color:
light brown, dark brown, or blackish brown.
Density:
3.43 - 3.48, Average = 3.45
Diaphaniety:
Translucent
Hardness:
5-6 - Between Apatite and Orthoclase
Luster:
Vitreous - Greasy
Streak:
light brown
More details...